// Configuration Axios
axios.defaults.baseURL = window.location.origin.includes('hf.space') 
  ? window.location.origin 
  : 'http://localhost:8000';

console.log("API base URL:", axios.defaults.baseURL);

// Variables globales
let uploadedFiles = [];
const MAX_FILE_SIZE_MB = 50;
const SUPPORTED_TYPES = ['pdf', 'docx', 'pptx', 'xlsx', 'jpg', 'jpeg', 'png'];

// Éléments DOM
const elements = {
  fileInput: document.getElementById('fileInput'),
  dropArea: document.getElementById('dropArea'),
  fileList: document.getElementById('fileList'),
  uploadStatus: document.getElementById('uploadStatus'),
  summaryFile: document.getElementById('summaryFile'),
  captionFile: document.getElementById('captionFile'),
  qaFile: document.getElementById('qaFile'),
  summarizeBtn: document.getElementById('summarizeBtn'),
  captionBtn: document.getElementById('captionBtn'),
  askBtn: document.getElementById('askBtn'),
  questionInput: document.getElementById('questionInput'),
  summaryResult: document.getElementById('summaryResult'),
  captionResult: document.getElementById('captionResult'),
  answerResult: document.getElementById('answerResult'),
  imagePreview: document.getElementById('imagePreview'),
  summarySpinner: document.getElementById('summarySpinner'),
  captionSpinner: document.getElementById('captionSpinner'),
  qaSpinner: document.getElementById('qaSpinner')
};

// Initialisation
document.addEventListener('DOMContentLoaded', () => {
  initVideoBackground();
  setupEventListeners();
  updateFileSelectors();
});

function initVideoBackground() {
  const video = document.getElementById('bg-video');
  if (video) {
    try {
      video.playbackRate = 0.8;
      video.muted = true;
      video.playsInline = true;
      video.play().catch(e => console.log("Video play error:", e));
    } catch (e) {
      console.log("Video initialization error:", e);
    }
    
    video.onerror = () => {
      document.body.style.background = "linear-gradient(135deg, #4a6fa5 0%, #166088 100%)";
    };
  }
}

function setupEventListeners() {
  // Gestion de l'upload
  if (elements.dropArea) {
    elements.dropArea.addEventListener('click', () => elements.fileInput.click());
    elements.dropArea.addEventListener('dragover', handleDragOver);
    elements.dropArea.addEventListener('dragleave', handleDragLeave);
    elements.dropArea.addEventListener('drop', handleDrop);
  }
  
  elements.fileInput.addEventListener('change', handleFileSelect);
  
  // Boutons d'action
  if (elements.summarizeBtn) {
    elements.summarizeBtn.addEventListener('click', summarizeDocument);
  }
  
  if (elements.captionBtn) {
    elements.captionBtn.addEventListener('click', generateCaption);
  }
  
  if (elements.askBtn) {
    elements.askBtn.addEventListener('click', answerQuestion);
  }
}

// Gestion des fichiers
function handleDragOver(e) {
  e.preventDefault();
  elements.dropArea.style.borderColor = '#4a6fa5';
  elements.dropArea.style.backgroundColor = 'rgba(74, 111, 165, 0.1)';
}

function handleDragLeave() {
  elements.dropArea.style.borderColor = '#4a6fa5';
  elements.dropArea.style.backgroundColor = 'rgba(74, 111, 165, 0.05)';
}

function handleDrop(e) {
  e.preventDefault();
  handleDragLeave();
  
  if (e.dataTransfer.files.length) {
    elements.fileInput.files = e.dataTransfer.files;
    handleFiles(elements.fileInput.files);
  }
}

function handleFileSelect() {
  if (elements.fileInput.files.length) {
    handleFiles(elements.fileInput.files);
  }
}

async function handleFiles(files) {
  const validFiles = Array.from(files).filter(file => {
    const ext = file.name.split('.').pop().toLowerCase();
    const isValidType = SUPPORTED_TYPES.includes(ext);
    const isValidSize = file.size <= MAX_FILE_SIZE_MB * 1024 * 1024;
    
    if (!isValidType) {
      showError(elements.uploadStatus, `Type non supporté: ${file.name}`);
      return false;
    }
    
    if (!isValidSize) {
      showError(elements.uploadStatus, `Fichier trop volumineux (max ${MAX_FILE_SIZE_MB}MB): ${file.name}`);
      return false;
    }
    
    return true;
  });
  
  if (!validFiles.length) return;
  
  showLoading(elements.uploadStatus, `Upload de ${validFiles.length} fichier(s)...`);
  
  const formData = new FormData();
  validFiles.forEach(file => formData.append('files', file));
  
  try {
    const response = await axios.post('/api/upload', formData, {
      headers: { 'Content-Type': 'multipart/form-data' },
      timeout: 60000
    });
    
    uploadedFiles = [...uploadedFiles, ...response.data];
    updateFileSelectors();
    renderFileList();
    showSuccess(elements.uploadStatus, `${validFiles.length} fichier(s) uploadé(s) avec succès !`);
  } catch (error) {
    handleUploadError(error);
  } finally {
    elements.fileInput.value = '';
  }
}

function renderFileList() {
  if (!elements.fileList) return;
  
  if (uploadedFiles.length === 0) {
    elements.fileList.innerHTML = '<p class="empty-message">Aucun fichier uploadé</p>';
    return;
  }
  
  elements.fileList.innerHTML = uploadedFiles.map(file => `
    <div class="file-item" data-file-id="${file.file_id}">
      <div class="file-info">
        <span class="file-icon">${getFileIcon(file.file_type)}</span>
        <span class="file-name">${file.file_name}</span>
        <span class="file-type">${file.file_type.toUpperCase()}</span>
      </div>
    </div>
  `).join('');
}

function updateFileSelectors() {
  const selectors = [
    { element: elements.summaryFile, types: ['pdf', 'docx', 'pptx', 'xlsx'] },
    { element: elements.captionFile, types: ['jpg', 'jpeg', 'png'] },
    { element: elements.qaFile, types: ['pdf', 'docx', 'pptx', 'xlsx', 'jpg', 'jpeg', 'png'] }
  ];
  
  selectors.forEach(({ element, types }) => {
    if (!element) return;
    
    const currentValue = element.value;
    element.innerHTML = element.id === 'qaFile' 
      ? '<option value="">-- Aucun --</option>'
      : `<option value="">-- Choisir ${element.id.includes('summary') ? 'un document' : 'une image'} --</option>`;
    
    uploadedFiles
      .filter(file => types.includes(file.file_type.toLowerCase()))
      .forEach(file => {
        const option = new Option(
          `${file.file_name} (${file.file_type.toUpperCase()})`,
          file.file_id
        );
        element.add(option);
      });
    
    element.value = currentValue;
  });
}

// Fonctions de traitement
async function summarizeDocument() {
  if (!elements.summaryFile || !elements.summaryResult) return;
  
  const fileId = elements.summaryFile.value;
  if (!fileId) {
    showError(elements.summaryResult, 'Veuillez sélectionner un document');
    return;
  }
  
  showLoading(elements.summaryResult, 'Génération du résumé en cours...');
  toggleSpinner(elements.summarySpinner, true);
  disableButton(elements.summarizeBtn, true);
  
  try {
    const response = await axios.post('/api/summarize', { 
      file_id: fileId,
      max_length: 200
    }, { timeout: 120000 });
    
    elements.summaryResult.innerHTML = `
      <h3>Résumé du document</h3>
      <div class="summary-content">${response.data.summary}</div>
    `;
  } catch (error) {
    handleProcessingError(error, elements.summaryResult, 'résumé');
  } finally {
    toggleSpinner(elements.summarySpinner, false);
    disableButton(elements.summarizeBtn, false);
  }
}

async function generateCaption() {
  if (!elements.captionFile || !elements.captionResult) return;
  
  const fileId = elements.captionFile.value;
  if (!fileId) {
    showError(elements.captionResult, 'Veuillez sélectionner une image');
    return;
  }
  
  // Afficher l'aperçu
  const file = uploadedFiles.find(f => f.file_id === fileId);
  if (file && elements.imagePreview) {
    try {
      const response = await axios.get(`/api/file/${fileId}`, { responseType: 'blob' });
      const url = URL.createObjectURL(response.data);
      elements.imagePreview.innerHTML = `<img src="${url}" alt="Image sélectionnée">`;
    } catch (error) {
      console.error("Error loading image preview:", error);
    }
  }
  
  showLoading(elements.captionResult, 'Analyse de l\'image en cours...');
  toggleSpinner(elements.captionSpinner, true);
  disableButton(elements.captionBtn, true);
  
  try {
    const response = await axios.post('/api/caption', { file_id: fileId }, { timeout: 60000 });
    elements.captionResult.innerHTML = `
      <h3>Description de l'image</h3>
      <p>${response.data.caption}</p>
    `;
  } catch (error) {
    handleProcessingError(error, elements.captionResult, 'description');
  } finally {
    toggleSpinner(elements.captionSpinner, false);
    disableButton(elements.captionBtn, false);
  }
}

async function answerQuestion() {
  if (!elements.questionInput || !elements.answerResult) return;
  
  const question = elements.questionInput.value.trim();
  if (!question) {
    showError(elements.answerResult, 'Veuillez saisir une question');
    return;
  }
  
  const fileId = elements.qaFile ? elements.qaFile.value : null;
  showLoading(elements.answerResult, 'Recherche de la réponse...');
  toggleSpinner(elements.qaSpinner, true);
  disableButton(elements.askBtn, true);
  
  try {
    const response = await axios.post('/api/answer', { 
      question,
      file_id: fileId || undefined
    }, { timeout: 120000 });
    
    elements.answerResult.innerHTML = `
      <h3>Réponse</h3>
      <div class="answer-content">${response.data.answer}</div>
    `;
  } catch (error) {
    handleProcessingError(error, elements.answerResult, 'réponse');
  } finally {
    toggleSpinner(elements.qaSpinner, false);
    disableButton(elements.askBtn, false);
  }
}

// Fonctions utilitaires
function getFileIcon(fileType) {
  const icons = {
    pdf: '📄',
    docx: '📝',
    pptx: '📊',
    xlsx: '📈',
    jpg: '🖼️',
    jpeg: '🖼️',
    png: '🖼️'
  };
  return icons[fileType.toLowerCase()] || '📁';
}

function showLoading(element, message) {
  if (!element) return;
  element.innerHTML = `
    <div class="status-message">
      <div class="loading-spinner"></div>
      ${message}
    </div>
  `;
}

function showSuccess(element, message) {
  if (!element) return;
  element.innerHTML = `
    <div class="status-message success">
      ✓ ${message}
    </div>
  `;
  
  if (element === elements.uploadStatus) {
    setTimeout(() => {
      element.innerHTML = '';
    }, 3000);
  }
}

function showError(element, message) {
  if (!element) return;
  element.innerHTML = `
    <div class="status-message error">
      ✗ ${message}
    </div>
  `;
}

function handleUploadError(error) {
  let message = 'Échec de l\'upload';
  
  if (error.response) {
    message += `: ${error.response.data.detail || error.response.statusText}`;
  } else if (error.code === 'ECONNABORTED') {
    message = 'Délai d\'attente dépassé (60s) - essayez avec des fichiers plus petits';
  } else if (error.message.includes('Network Error')) {
    message = 'Impossible de se connecter au serveur - vérifiez votre connexion';
  } else {
    message += `: ${error.message}`;
  }
  
  showError(elements.uploadStatus, message);
}

function handleProcessingError(error, element, action) {
  let message = `Échec de la génération du ${action}`;
  
  if (error.response) {
    message += `: ${error.response.data.detail || error.response.statusText}`;
  } else if (error.code === 'ECONNABORTED') {
    message = `Délai d'attente dépassé pour le ${action}`;
  } else {
    message += `: ${error.message}`;
  }
  
  showError(element, message);
}

function toggleSpinner(spinnerElement, show) {
  if (spinnerElement) {
    spinnerElement.style.display = show ? 'block' : 'none';
  }
}

function disableButton(buttonElement, disable) {
  if (buttonElement) {
    buttonElement.disabled = disable;
    buttonElement.style.opacity = disable ? 0.7 : 1;
    buttonElement.style.cursor = disable ? 'not-allowed' : 'pointer';
  }
}

function openTab(tabName) {
  // Masquer tous les onglets
  document.querySelectorAll('.tab-content').forEach(tab => {
    tab.classList.remove('active');
  });
  
  // Désactiver tous les boutons
  document.querySelectorAll('.tab-button').forEach(btn => {
    btn.classList.remove('active');
  });
  
  // Activer l'onglet sélectionné
  const tab = document.getElementById(tabName);
  if (tab) tab.classList.add('active');
  
  // Activer le bouton sélectionné
  event.currentTarget.classList.add('active');
}